Looks like nitrous oxide is a major ozone destroyer....
Laughing Gas No Laughing Matter in Atmosphere
Nitrous oxide is damaging the ozone layer and the climate.
There's a whole lot of laughing gas in the atmosphere these days. But it's no laughing matter. Nitrous oxide, or N2O, wafts up from manure and the chemical fertilizer sprayed on fields. Industry contributes as well.
Scientists at the National Oceanic and Atmospheric Administration published a new study in Science today confirming that this gas is chewing away at the ozone layer as well as contributing to climate change.
In fact, now that the world has banded together to eliminate chlorofluorocarbons and the other volatile gases previously responsible for carving out the seasonal hole in the ozone layer, laughing gas is the lead culprit, according to the researchers.